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4Ghz Core 2 Duo vs M.A.M.E. 0.120 (benchmark results)
John IV [MameUI64]:
Also just an FWIW note for those that have had their C2D machines for a while, I just opened my case after a year or so and used compressed air to blow out the dust that had accumulated on the heatsink/fan assemblage and it immediately dropped 10+ degrees under load. So be sure to keep your equipment clean so it can do its job. :)
taz-nz:
--- Quote from: john iv on November 30, 2007, 03:39:48 am ---Also just an FWIW note for those that have had their C2D machines for a while, I just opened my case after a year or so and used compressed air to blow out the dust that had accumulated on the heatsink/fan assemblage and it immediately dropped 10+ degrees under load. So be sure to keep your equipment clean so it can do its job. :)
--- End quote ---
Yeah, those dust bunnies will get you everytime. ;D
TheManuel:
I agree.
My case sucks in dust like you woun't believe.
When re-sat my heat sink a couple of weeks ago I cleaned everything well so I am not sure what made the most difference, the re-seating or the cleaning but I dropped a few degrees at idle.
--- Quote from: john iv on November 30, 2007, 03:39:48 am ---Also just an FWIW note for those that have had their C2D machines for a while, I just opened my case after a year or so and used compressed air to blow out the dust that had accumulated on the heatsink/fan assemblage and it immediately dropped 10+ degrees under load. So be sure to keep your equipment clean so it can do its job. :)
--- End quote ---
TheManuel:
Tiger-Heli:
Here are all the benchmarks the CPU allowed me to do:
1.8GHz 2.4GHz 2.7GHz
sfrush 60.2% 75.9% 84.3%
crusnusa 99.2% 133.6% 150.2%
swtrilgy 25.6% 40.8%
ridgerac 44.8% 59.6% 66.2%
All of the above was run on Windows XP with the official MAME binary. This is the generic one with no optimization.
I could not get to 3.0GHz as much as I tried. Windows simply would not start. I don't think I am doing anything different from a few weeks ago when I managed to have it running at 3.0GZ for a whole week until one day it just would not load Windows. I can't imagine what kind of threshold I might have crossed that now 3.0 is off limits with stock voltage. I want to run at stock voltage since I want the processor to live long so it does not look like I will be able to get to that benchmark but you can extrapolate from the results above.
All of the notes below are for 2.7GHz:
For sfrush, the results might not be too accurate because, as I mentioned before, I had to hit P1 to get rid of the controller calibration screen or it stays there for the duration of the benchmark. The problem is that, while at the calibration test screen, MAME runs very fast since there is not 3D modelling going on. So according to exactly when the game registered the cancellation of the screen, I could have more or less average performance on each benchmark.
During the actual game, the FPS fluctuated between 40% and 80%. Not very playable.
Crusnusa ran 100%, no problem.
I did not bother to re-run the missing swtrilgy benchmark since it is so woefully slow. During gameplay, the game ranin the low 30%.
Ridgerac ran in the 30%, very slow.
I suppose you can enable framskip for some of these games and get by.
Regards.
TheManuel:
--- Quote ---I lot of my knowledge of effects of bandwidth on system preformance come from my P4 days, when I ran a 2.8ghz P4 northwood (512k cache) @ 3.5ghz 250mhz FSB with DDR-500 , that system was faster than a 3.6ghz P4 Prescott (2mb cache) with DDR-400, it was almost as fast as a 3.8ghz P4 Prescott. The extra cache memory in Prescott Core could not make up for the lack of system & memory bandwidth, the P4 Core simply needed more bandwidth to keep it work hard at high clock speeds. I also spend a lot time disigning Dual CPU Quad Core Xeon server setup for customers at work, these use a Quad Channel memory setup to supply enough memory bandwidth to keep 8 cores working hard.
Now not all of this knowledge directly applies to Core 2 Duo, but the basic rules still apply bandwidth matters it just depend of your setup how much. I'm just trying to get people to look at their system setups as a whole rather than just focusing on the CPU clock speed, the best preformance always comes from balanced systems.
I hope you get where I'm trying to come from.
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taz:
I had more time to read you post carefully.
I do understand your perspective on it. As I was researching my system, I read how bandwidth was a big deal on P4's so much more than with C3D's due to their architecture (I don't know the details, though). But of course, there should be a minimum you have to supply before you cut into peformance as your benchmarks showed.